Birds Circulatory system

 

Pelecanus sp Heart Purkinje cells under endocardium

 

 

Penguin sp unkn. Lung Meandering of proliferated arteriae

 

Psittacus erithacus Atheromatosis

 

 

 

 

Uria aalge Lymphangitis (Note the valves in The vessel)

 

Ara macao B01-272-98 Circulatory failure Blood stasis in lung